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[TowerTalk] pipe tap drill size

To: antennas <>, towertalk <>
Subject: [TowerTalk] pipe tap drill size
From: r miles <>
Reply-to: "Tower and HF antenna construction topics." <>
Date: Thu, 11 Mar 2010 14:05:45 -0500
List-post: <">>
I am putting two gusset plates to hold truss supports on my homebrew 30m Moxon. 
I'm using 1/4'' X 20 bolts. It's  been 40 yr.s since I worked in a machine 
shop. Don't have the proper hole size chart  for taps anymore.  I assume the 
hole size to be threaded 1/4 x 20 is less than 3/16''. Anyone have a chart 
showing the proper size.TNX

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